This thread goes through the initial setup, ie making an account etc.
I tried to search for more step by step instructions but couldn’t find anything straight away. I’ll just sum it up quickly.
You’ll need go ssh into your Gameshell to add your username and password.
After you’ve gotten that, you can view the achievements setting in the main retroarch settings page. Activate it there.
To view the achievements list, use the hotkey to enter the retroarch menu, after loading your game. Then go to the quick menu. There should be an achievements menu item you can select.
